Conan, Ran, Sonoko and the Detective Boys are invited to an island for free diving lessons, but bad weather prevents them from doing so. While walking around the island, they stumble upon a shooting of a promotional video by washed up actor Yuya Miyasaka. While they watch, they see that Miyasaka physically harrases many of the crew members. It starts to rain soon after and every one comes back inside, but Miyasaka is found murdered later on.

Due to being chosen to particpate as a baton twirler during the Grand Opening of the Beika Park's Flower Clock, Ayumi has been practicing her moves in front of the clock every morning. When she invites Conan and the others to watch, they witness a drunk man wandering around and generally being a nuisance. The next morning, the man is found dead, his head smashed on the stone number 6.